From 90790898a1c93072d080f46b30259ee5ca4e6435 Mon Sep 17 00:00:00 2001 From: David Hildenbrand Date: Mon, 15 Jan 2018 00:04:07 +0100 Subject: s390x/mmu: Add EDAT2 translation support This only adds basic support to the DAT translation, but no EDAT2 support for TCG. E.g., the gdbstub under kvm uses this function, too, to translate virtual addresses. Reviewed-by: Thomas Huth Signed-off-by: David Hildenbrand --- target/s390x/mmu_helper.c | 15 ++++++++++++--- 1 file changed, 12 insertions(+), 3 deletions(-) (limited to 'target/s390x/mmu_helper.c') diff --git a/target/s390x/mmu_helper.c b/target/s390x/mmu_helper.c index dc33c63b1d..e27e21328b 100644 --- a/target/s390x/mmu_helper.c +++ b/target/s390x/mmu_helper.c @@ -120,6 +120,7 @@ static int mmu_translate_asce(CPUS390XState *env, target_ulong vaddr, { const bool edat1 = (env->cregs[0] & CR0_EDAT) && s390_has_feat(S390_FEAT_EDAT); + const bool edat2 = edat1 && s390_has_feat(S390_FEAT_EDAT_2); const int asce_tl = asce & ASCE_TABLE_LENGTH; const int asce_p = asce & ASCE_PRIVATE_SPACE; hwaddr gaddr = asce & ASCE_ORIGIN; @@ -217,13 +218,21 @@ static int mmu_translate_asce(CPUS390XState *env, target_ulong vaddr, if ((entry & REGION_ENTRY_TT) != REGION_ENTRY_TT_REGION3) { return PGM_TRANS_SPEC; } - if (VADDR_SEGMENT_TL(vaddr) < (entry & REGION_ENTRY_TF) >> 6 || - VADDR_SEGMENT_TL(vaddr) > (entry & REGION_ENTRY_TL)) { - return PGM_SEGMENT_TRANS; + if (edat2 && (entry & REGION3_ENTRY_CR) && asce_p) { + return PGM_TRANS_SPEC; } if (edat1 && (entry & REGION_ENTRY_P)) { *flags &= ~PAGE_WRITE; } + if (edat2 && (entry & REGION3_ENTRY_FC)) { + *raddr = (entry & REGION3_ENTRY_RFAA) | + (vaddr & ~REGION3_ENTRY_RFAA); + return 0; + } + if (VADDR_SEGMENT_TL(vaddr) < (entry & REGION_ENTRY_TF) >> 6 || + VADDR_SEGMENT_TL(vaddr) > (entry & REGION_ENTRY_TL)) { + return PGM_SEGMENT_TRANS; + } gaddr = (entry & REGION_ENTRY_ORIGIN) + VADDR_SEGMENT_TX(vaddr) * 8; /* fall through */ case ASCE_TYPE_SEGMENT: -- cgit v1.2.3